The majority of shoulder injuries occur due to repetitive overhead movements, with baseball pitching being the most common mechanism for overuse injury. Before studying the treatment of these shoulder injuries, it is paramount that the health professional have an understanding of the etiology of and the underlying mechanisms for shoulder pathology. The act of overhead throwing is an eloquent full-body motion that requires tremendous coordination from the time of force generation to follow-through. The shoulder complex is a crucial component of the upper body kinetic chain as it transmits force created in the lower body to the arm and hand to produce velocity and accuracy with ball release. The focus of this article is on the biomechanics of the throwing motion, with emphasis on the kinematics of the shoulder. The established phases of the throwing motion will be reviewed in a stepwise manner and the contributions of osseous and soft-tissue structures to the successful completion of each phase will be discussed.
Chu SK, Jayabalan P, Kibler WB, Press J. Chu SK, et al. PM R. 2016 Mar;8(3 Suppl):S69-77. doi: 10.1016/j.pmrj.2015.11.015. PM R. 2016. PMID: 26972269 Review.
Ejnisman B, Lara PHS, Ribeiro LM, Belangero PS. Ejnisman B, et al. Rev Bras Ortop (Sao Paulo). 2021 Jun;56(3):275-280. doi: 10.1055/s-0040-1702958. Epub 2020 Mar 23. Rev Bras Ortop (Sao Paulo). 2021. PMID: 34239190 Free PMC article.
Xue Q, Masuda K. Xue Q, et al. Chin Med J (Engl). 1997 Mar;110(3):220-4. Chin Med J (Engl). 1997. PMID: 9594345
McConnell J, Donnelly C, Hamner S, Dunne J, Besier T. McConnell J, et al. PM R. 2012 Feb;4(2):111-6. doi: 10.1016/j.pmrj.2011.11.010. PM R. 2012. PMID: 22373460
Patel NB, Thomas S, Lazarus ML. Patel NB, et al. Radiol Clin North Am. 2013 Mar;51(2):257-77. doi: 10.1016/j.rcl.2012.09.016. Epub 2012 Dec 21. Radiol Clin North Am. 2013. PMID: 23472590 Review.
Hank M, Miratsky P, Ford KR, Clarup C, Imal O, Verbruggen FF, Zahalka F, Maly T. Hank M, et al. Front Physiol. 2024 Apr 26;15:1371134. doi: 10.3389/fphys.2024.1371134. eCollection 2024. Front Physiol. 2024. PMID: 38737828 Free PMC article.
Bennett T, Thomas L, Wilson AD. Bennett T, et al. PLoS One. 2024 Apr 17;19(4):e0301320. doi: 10.1371/journal.pone.0301320. eCollection 2024. PLoS One. 2024. PMID: 38630752 Free PMC article.
Wasser JG, Bruner ML, Chen C, Vincent HK. Wasser JG, et al. Orthop J Sports Med. 2024 Mar 14;12(3):23259671241231958. doi: 10.1177/23259671241231958. eCollection 2024 Mar. Orthop J Sports Med. 2024. PMID: 38496334 Free PMC article.
Lau R, Mukherjee S. Lau R, et al. Orthop J Sports Med. 2023 Mar 21;11(3):23259671231156199. doi: 10.1177/23259671231156199. eCollection 2023 Mar. Orthop J Sports Med. 2023. PMID: 36970317 Free PMC article.
King S, Dong L, Caron M, Côté JN. King S, et al. Front Sports Act Living. 2022 Jul 13;4:881582. doi: 10.3389/fspor.2022.881582. eCollection 2022. Front Sports Act Living. 2022. PMID: 35911373 Free PMC article.